Severe storms slammed our area again Monday night bringing heavy rain, flooding, power outages and damage across the region. Several Flood Advisories, Coastal Flood Advisories and Severe Thunderstorm Warnings were in effect. Click here to share your photos
They may look ominous, but shelf clouds aren't the worst parts of a thunderstorm. NBC10 First Alert Weather Meteorologist Krystal Klei explains how they form.